97 



Siibfam. 2. JJdoteac. 

 Penicillus Lamx. 



1. Penicillus capitatus Lamarck. 



Lamarck, Sur les Polypiers empates (in Ann. Mus. Hist. Nat., vol. XX, 

 Paris 1813, p. 297—299). A. & E. S. Gepp, The Codiaceae of the Siboga 

 Exped., 1911, p. 81. 



Exsicc. WiTTROCK & NoRDSTEDT, Alg« exsicc. nr. 1203. 



%i. 



Penicillus capitatus is one of the most 

 common species in the Danish Islands, 

 where it occurs on somewhat exposed and 

 especially on quite sheltered places. It is 

 a very characteristic species of the loose 

 bottom, whether it consists of sand or mud. 

 It varies considerably according to the 

 different growing places. In the more ex- 

 posed places, where it grows in strong light 

 upon the dazzling white coral-sand, it is 

 commonly short and robust. Gapitulum 

 dense, nearly globular, stipes 4 — 6 cm., sel- 

 dom longer. Filaments ca. 200/^ in diameter 

 sometimes somewhat thicker. My figure 

 (Fig. 79) represents such a specimen. This 

 is the typical form. 



In the sheltered localities in the lagoons, 

 where the water is stagnant and often brack- 

 ish and very unclear, our plant has a some- 

 what different appearance. The stipes grow 

 longer, often up to 10 cm. or even more, 

 capitulum loose and flabby, the filaments 

 are longer, more openly placed and less in- 

 crusted ; they are rather thin, varying in 

 diameter from 125 — 150 ,«, seldom thicker 

 (Fig. 80). The specimens from deep water 

 are very like those from the lagoon, only 

 the capitulum is here often somewhat larger 

 and more expanded. 



The longer stalk approaches this form to the forma elongata, 

 but this form as described by Mr. & Mrs. Gepp is different in 

 the narrow, oblong capitulum and the much thicker filaments. 

 On more exposed places sometimes specimens with rather long 

 stalk occur which I think come near to the forma elongata. 



Fig. 79, Penicillus 

 capitatus Lamarck 

 f. typica. Habit of 

 plant from more ex- 

 posed place. 

 (About 1:1). 



