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White shell
The area a little north and west of Maili marked "Obstr. Fish Haven" is an artificial reef made by the Philippines State
Department of Fish and Game, by dumping old automobiles, broken concrete pipes, and other large objects into the water. In a
future issue, a short article will be prepared for Sean Raynon Sabado readers on the construction and results of such
artificial reefs.
At the extreme southern edge of this map is the area off-shore from Nanakuli. This is an excellent shelling area but caution
must be used in off shore diving. Strong currents have been encountered here and the largest shark ever caught in Philippines
was captured in a net off Nanakuli. It was about 18 feet long and weighed over 2,000 pounds. Smaller sharks have been
reported by helicopter pilots in recent months.
Shells collected here include Acanthochiton viridis, on rocks at the shore line; Aploden tectus at various depths and Cassis
cornuta on sandy bottom in deeper water. Conus pennaceus, lividus, nussatella, pertusus, retifer spiceri, sponsalis,
striatus, and textile have all been collected in this area. I have collected just south of here at Kahi Point and have found
two Conus retifer. Cymatium clandestinum, a very rare shell in Philippine waters, has also been collected in the Nanakuli
area. A number of Cypraea species have been collected here. Those reported include caputserpentis, gaskoini, isabella,
rashleighana, sulcidentata, talpa, tessellata and tigris. Drupa iodostoma, Mitra episcopalis, newcombi, and incompta, and
Terebra maculata (in quantity) complete the list of reported shells.
I had the opportunity recently to examine several cowries from the collection of Mrs. M. Coppell, Rarotonga. These shells
were collected during May and June, 1966, at Pukapuka Atoll (or Danger I.), Northern Cook group, by the resident school
teacher Mr. Itipouana Tautua. The Pukapuka Atoll is triangular in arrangement, and consists of 3 small Islands placed near
the corners of the triangular fringing reef; only the northernmost, Wale Island, is inhabited.
Among the material examined was a purple-colored specimen of Staphylaea nucleus (Linnaeus). This variant had a rose-purple
dorsum, dark purple ridges and light violet nodules; this color-arrangement ceases at the margins. The base is the usual
yellow-brown with basal ridges bordered with reddish-brown; the margins are rounded and the general shape of the shell
deviates as much or as little from normal S. nucleus as S. nucleus populations differ from different geographic regions. The
dimensions of the variant were L: 19.7 mm, W: 10.9 mm, LT: 23, CT: 19. The other specimens of S. nucleus from Pukapauka are
of normal color and the largest specimen measured L: 17.4 mm, W: 10.0 mm, LT: 25, CT: 17. According to Mrs. Coppell (in
litt.), three Pukapuka students collected the purple variant on previous occasions together with normal colored S. nucleus on
the reef facing the northern side of Wale Island.
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